This simple module offers an input type for showing a giving the user the opportunity to copy a certain field value from another record. This is useful for fields that are very complex to configure.
Use the inputType "fieldValueCopier" for your field.
'someField' => array(
// no label necessary
'inputType' => 'fieldValueCopier',
'eval' => array(
'fieldValueCopier' => array(
'table' => 'tl_my_dca',
'field' => 'myField',
'options_callback' => array('Namespace\SomeClass', 'getOptions')
)
)
)